<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>

    <script type="text/javascript">
        //编写一个js的对象
        var user = {
            name: "阮欣",
            age: 3,
            sex: "男"
        };
        //将js对象转换成json字符串
        var str = JSON.stringify(user);
        console.log(str);

        //将json字符串转换为js对象
        var user2 = JSON.parse(str);
        console.log(user2.age, user2.name, user2.sex);

    </script>
    </body>
</html>